Home / 5,212.90-7,820.57-1,515.21

Finding the Fourth Proportional to 5,212.90, 7,820.57 and 1,515.21

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Solution

The fourth proportional to 5,212.90, 7,820.57 and 1,515.21 is: 2,273.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,212.90 : 7,820.57 = 1,515.21 : x
  2. Step 2: Convert to fraction form
    5,212.90/7,820.57 = 1,515.21/x
  3. Step 3: Cross multiply
    5,212.90x = 7,820.57 × 1,515.21
  4. Step 4: Simplify right side
    5,212.90x = 11,849,805.87
  5. Step 5: Solve for x
    x = 11,849,805.87/5,212.90
  6. Step 6: Final answer
    x = 2,273.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.